[Differences in the physiologic characteristics of systems of conditioned connections when elaborated gradually and suddenly].

Observations and experimental results have revealed two types of system formation, with gradual and instantaneous conditioning. The first type is characterized by inertia, which is linked with high intensity of the developing conditioned tonic excitation. In the case of the other type, the system is labile and the conitioned tonic excitation is of optimal strength.

[Physiologic characteristics of systems of conditioned connections during urgent formation of a program of action].

Examination of preschool age children has shown that instantaneous formation of a system is possible only on the basis of integration of conditioned reflexes, which are differentiated by the nature or strength of reinforcement. Integration of previously elaborated conditioned reflexes is more successful if the initial systems of conditioned connections were in a state of conditioned tonic excitation of an optimal strength. Uniformly strong or uniformly weak stability of all reflexes in the system renders it inert, hence makes it a poor basis for instantaneous formation of a new system.